Boethius
The modern library, 1943
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
edited by John Herman Randali, Justus Buchler
Barnes & Noble, 1950
Buku Teks
Chen, Liu-Fu, author
Philosophical Library, 1948
Buku Teks
Ayer, A. J. (Alfred Jules), 1910-1989, author
Macmillan, 1963
Buku Teks